Adjustable spanner wrench



April 13, 1950 Q A. HOTCHKISS, JR 8.

ADJUSTABLE SPANNER WRENCH Filed April 30, 1946 INVENTOR. V ARCH HOTGHK/SS JR.

ATTORNEY Patented Apr. 18, 1950 ADJUSTABLE 'SPANNER WRENCH Arch Hotchkiss, Jr., San Diego, Calif., assignor to Reconstruction Finance Corporation, Los

Angeles, Calif., a corporation of the United States Application April 30, 1946, Serial No. 666,129

2 Claims. I

My invention relates to an adjustable spanner wrench and the objects of my invention are:

First, to provide a spanner wrench of this class which is readily adjustable for use in connection with a variety of sizes of nuts;

Second, to provide a spanner Wrench of this class which is readily adjustable for engagement with various size nuts and may be set in position so that the nut is not compressed unduly by operating engagement of the jaw members therewith.

With these and other objects in view as will appear hereinafter, my invention consists of certain novel features of construction, combination and arrangement of parts and portions as will be hereinafter described in detail and particularly set forth in the appended claims, reference being had to the accompanying drawings and to the characters of reference thereon, forming a part of this application in which:

Figure 1 is a fragmentary edge elevational view of my spanner wrench and Fig. 2 is a fragmentary sectional view thereof taken from the line 22 of Fig. 1, showing parts and portions in elevation to facilitate the illustration.

Similar characters of reference refer to similar parts and portions throughout the several views of the drawings.

The handle member I, jaw members 2 and 3, adjusting screw 4, and the pins 5 and 6 constitute the principal parts and portions of my spanner wrench.

The handle member I is provided with a hand engagin portion la and a bifurcated portion lb in which the jaw members 2 and 3 are pivotally mounted on the pins 5 and 6, extending through said bifurcated portion lb. The jaw member 3 is substantially L-shaped and is provided with a spanner nut engaging lug portion 3a on its one end. The jaw member 2 is provided with a nut engaging recess portion 2a therein, adjacent to which the bearing portion 2b thereof engages the straight bearing portion 3b of the jaw member 3. Near the end opposite to the bearin portion 2b, an edge portion of the jaw member 2 is engaged by the adjusting screw 4 which is in screw-threaded relation with the handle l, intermediate the bifurcated portions lb, all as shown best in Fig. 2 of the drawings. The adjusting screw 4 is provided with a spheroid end portion 4a, adapted to engage the edge portion 20 of the jaw member 2 when in various angular positions relatively to the axis of the adjusting screw 4. This adjusting screw 4 is provided with external Screw. threads 4b, en-

2 gaging the internal screw threads lc of the handle member I, all as shown best in Fig. 2 of the drawings. It will be here noted that the jaw member 2 is substantially triangular in form and engages the jaw member 3 and the adjusting screw 4 on opposite sides of the pivotal axis of the pin 5 on which said jaw member 2 is pivotally mounted in connection with the handle member l.

The operation of my spanner wrench is substantially as follows:

When adjusting my spanner wrench for a certain size nut, the adjusting screw 4 is operated by manually engaging the knurled head 40 thereof and the adjusting screw 4 is turned until the jaws 2 and 3 assume the proper spaced relation for snugly engaging the nut at the lug portion 3a and recessed portion 2a of the jaws 3 and 2 respectively. In operation, the tendency of the jaws 2 and 3 to pivot toward each other in connection with the handle I, is limited by the engagement of the adjusting screw 4 at its spheroid end portion 4a with the edge 20 of the jaw member 2. Thus, the jaws 2 and 3 are prevented from crushing a relatively thin spanner nut or unduly compressing the same and galling the threads thereof. When the handle I is forced in the direction as indicated by the arrow A in Fig. 2 of the drawings, the lug portion 3a is positioned in the conventional recess in the periphery of the nut and the jaw member 3 is caused to pivot on the pin 6 until the edge portion 3b thereof engages the bearing portion 2b of the jaw member 2, which is so adjusted in connection with the adjusting screw 4 that the diameter of the nut is substantially the distance between the bearing portions of the recess 2a and the lug 3a of the jaws 2 and 3 respectively. It will be here noted that when the jaw member 3 is pivoted on the pin 6, it engages the bearing portion 2?) of the jaw member 2 causing the jaw member 2 to pivot on the pin 5, into engagement with the spheroid end portion 4a of the adjusting screw 4.

Though I have shown and described a particular construction, combination and arrangement of parts and portions, I do not wish to be limited to the particular construction, combination and arrangement, but desire to include in the scope of my invention, the construction, combination and arrangement substantially as set forth in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a spanner wrench of the class described,

the combination of a handle member, a pair of jaw members pivotally connected with said handle member, and a set-screw in screw threaded connected relation with said handle member and engaging one of said jaws, one of said jaws having a spanner nut engaging lu portion, the other of said jaws having a nut enga in recess portion in ppos d elation to said his w t on. said adjusting screw engaging one of said jaws at one side of the pivotal axis thereof, both of said jaws engaging each other at a point on the opposite side of said pivotal axis from said adjusting screw.

2. In a spanner wrench Q4.- the classdescribed.

the combination of a handle member having a,

bifurcated portion, a pair of jaws intermediate the bifurcated portions of said handle member and pivotally connected thereto, said jaws 'being engageable with each other at a point spaced from said pivots, and an adjusting screw in th e de r lation with said handle a d e g n one of sa d jaws lt-a po nt which is spaced from ARCH HOTCHKISS, J R.

REFERENCES CITED 1 The following references are of record in the I file of this patent:

UNITED STATES PATENTS :Number Name Date 461,032 Miller Oct. 13, 1891 813,892 Hielscher et a1 Feb. 27, 1906 927,270 Nicholson July 6, 1909 1,198,243 Leonard Sept. 12, 1916 1A83A97 Whitfield Feb. 12, 1924 1,504,847 Tarr Aug. 12, 1924 1345.5;00 Cummings "7... Feb. 16, 193 1,910,268 Sorensen May 23, 1933 

